How to filter a multilevel array?

Question

JavaScript

Good afternoon.

There is an array with real estate filtered.
Inside each element there is an array of features -> internals. And in internals you need to check if the array element has an object with the property name === 'Camere' and number !== ''

I wrote the code, but it returns an empty array.

I pointed out in the comments there that the first return works, but I also need to check the internals array.

const result = this.filtered.filter(item => {

                  // Так работает
                  return item.features && item.features.internals && item.features.internals.length > 0;

                  // Так не работает
                  if (item.features && item.features.internals && item.features.internals.length > 0) {
                      return item.features.internals.forEach(el => {
                          if (el.name === 'Camere' && el.number !== "") {
                              // console.log(Number(this.room), 'this.room')
                              // console.log(Number(el.number), 'el.number')
                              console.log(Number(this.room) === Number(el.number), 'Number(this.room) === Number(el.number)')
                              return Number(this.room) === Number(el.number)
                          }
                      });
                  }
              })
              console.log(result, 'result');

Thanks in advance for help.

Answer 1

forEach always returns undefined, so you always end up with an empty array after filter.